/**
 * Copyright (c) <2010>, <SUNNY GUPTA>
 * All rights reserved.

 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *   * Neither the name of the <ORGANIZATION> nor the
 *     names of its contributors may be used to endorse or promote products
 *     derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL <SUNNY GUPTA> BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.gwtp.investmentadvisor.client.place;

import com.google.inject.Inject;
import com.google.inject.Singleton;
import com.gwtplatform.mvp.client.EventBus;
import com.gwtplatform.mvp.client.proxy.PlaceManagerImpl;
import com.gwtplatform.mvp.client.proxy.PlaceRequest;
import com.gwtplatform.mvp.client.proxy.TokenFormatter;

/**
 * 
 * @author Sunny Gupta
 *
 */
@Singleton
public class AppPlaceManager extends PlaceManagerImpl {

  private final PlaceRequest defaultPlaceRequest;
  private final String errorPlaceNameToken;
  
  @Inject
  public AppPlaceManager(EventBus eventBus, 
      TokenFormatter tokenFormatter,
      @DefaultPlace String defaultPlaceNameToken,
      @ErrorPlace String errorPlaceNameToken) {
    super(eventBus, tokenFormatter);
    
    // Instantiate
    this.defaultPlaceRequest = new PlaceRequest(defaultPlaceNameToken);
    this.errorPlaceNameToken = errorPlaceNameToken;
  }

  @Override
  public void revealDefaultPlace() {
    revealPlace(defaultPlaceRequest);
  }

  /**
   * Called when an invalid token is accessed.
   */
  @Override
  public void revealErrorPlace(String invalidHistoryToken) {
    // Form place request
    PlaceRequest errorPlaceRequest =  new PlaceRequest(this.errorPlaceNameToken);
    // Add invalidHistoryToken parameter
    // TODO: Have some way so that error screen presenter gets these parameters
    errorPlaceRequest.with("invalidHistoryToken", invalidHistoryToken);
    revealPlace(errorPlaceRequest);
  }
  
  /**
   * Called when a token is valid but GateKeeper didn't authorize the access.
   */
  @Override
  public void revealUnauthorizedPlace(String unauthorizedHistoryToken) {
    // For login place
    if (unauthorizedHistoryToken.equals(PlaceNameTokens.LoginScreenNameToken)) {
      // User already logged in and requested login page, show dashboard
      revealPlace(new PlaceRequest(PlaceNameTokens.UserDashboardNameToken));
      return;
    }
    
    // For other places, who are Gate kept by User login, show login page
    PlaceRequest loginPlaceRequest = new PlaceRequest(PlaceNameTokens.LoginScreenNameToken)
                      .with(PlaceNameTokens.LOGIN_PARAM_REDIRECT, unauthorizedHistoryToken);
    revealPlace(loginPlaceRequest);
  }
}
